Starman, in Augustins' photo the central wing is kinda forked into 2 then back to 1 at the bottom. However on NepG's photo there is very precisely 1 wing in the center. That is the difference. Mine has the same thing as Augustin's does. 1 at the top spreading into 2 and then back to 1 at the bottom, though I think the "spread" wing is more common than people notice.
Perhaps knowing where each plant came from (distributor) might help in figuring out if this is a variant. Mine came from Tony.